Write Snake game with a minimum of JS code

Game show page

 

GAME OVER page display

 

 code show as below:

 

 

<body>
<canvas id="can" width="400" height="400" style="background: Black"></canvas>
<script>
There sec = [42, 41]
dz = 43,
fx = 1,
n, ctx = document.getElementById("can").getContext("2d");

function draw(t, c) {
ctx.fillStyle = c;
ctx.fillRect(t % 20 * 20 + 1, ~~(t / 20) * 20 + 1, 18, 18);
}
document.onkeydown = function(e) {
fx = sn[1] - sn[0] == (n = [-1, -20, 1, 20][(e || event).keyCode - 37] || fx) ? fx : n
};
! function() {
sn.unshift(n = sn[0] + fx);
if (sn.indexOf(n, 1) > 0 || n < 0 || n > 399 || fx == 1 && n % 20 == 0 || fx == -1 && n % 20 == 19)
return alert("GAME OVER");
draw(n, "Lime");
if (n == dz) {
while (sn.indexOf(dz = ~~(Math.random() * 400)) >= 0);
draw(dz, "Yellow");
} else
draw(sn.pop(), "Black");
setTimeout(arguments.callee, 130);
}();
</script>
</body>

</html>

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Origin www.cnblogs.com/GME-qiyueliu/p/11459642.html